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Description

Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Ollama. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloadBlob function. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated array. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-27277.

PUBLISHED Reserved 2026-07-13 | Published 2026-07-13 | Updated 2026-07-14 | Assigner zdi




HIGH: 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-129: Improper Validation of Array Index

Product status

Default status
unknown

0.7.1
affected

References

www.zerodayinitiative.com/advisories/ZDI-26-403/ (ZDI-26-403)

cve.org (CVE-2026-15685)

nvd.nist.gov (CVE-2026-15685)

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